A filter assembly and filter

Abstract

The present application relates to a refinery dry gas filter device technical field, especially to a kind of filter assembly and filter.The filter assembly includes cylindrical closed shell, filter cartridge is coaxially arranged in shell, rotating disc is rotationally arranged at the top of filter cartridge, the rotating disc is axially provided with inclined hole communicated with filter cartridge, airflow can drive rotating disc to rotate when passing through inclined hole, rotating disc outer side wall is rotationally connected with shell inner side wall, rotating disc lower end surface is provided with helical scraper and central shaft, helical scraper is respectively abutted with filter cartridge outer side wall and shell inner side wall, central shaft is connected with annular scraper abutting filter cartridge inner side wall by cam mechanism, central shaft rotates, and annular scraper can vertically reciprocate;The filter assembly in the application has low filtering energy consumption, long service life and complete coke powder and tar removal, and the filter containing the filter assembly can be passed into cold medium for heat exchange, to improve the tar removal effect and complete heat exchange, energy saving and environmental protection.

Description

Technical Field

[0001] This invention relates to the field of refinery dry gas filtration equipment technology, and more particularly to a filtration component and filter. Background Technology

[0002] Refinery dry gas is a non-condensable gas produced in oil refineries during the secondary processing of crude oil. Its main components are hydrocarbons such as ethylene, propylene, and methane, and it is typically used as fuel or chemical feedstock. Refinery dry gas originates from processes such as catalytic cracking, thermal cracking, and delayed coking. Catalytic cracking produces approximately 4%-5% of the crude oil processed dry gas. The dry gas formed from catalytic cracking initially contains impurities such as coke dust and tar, which need to be filtered to remove before usable catalytic dry gas can be obtained.

[0003] Patent application number CN201310334457.1 discloses an automatic back-purge filtration device for catalytic and coking dry gas, including a filtration unit and an automatic back-purge unit. The filtration unit includes a filter housing, a filter element, and a tube sheet, wherein the tube sheet is disposed on the upper part of the filter housing, the filter element is fixed on the lower side of the tube sheet, and an air inlet is provided on the side wall of the tube sheet. The automatic back-purge unit includes an automatic back-purge control device and a buffer tank, wherein the air inlet end of the automatic back-purge control device is connected to the buffer tank, and the air outlet end of the automatic back-purge control device is connected to the air inlet on the side wall of the tube sheet. This device can effectively filter coke powder and tar, protect the compressor, and ensure the smooth operation of the ethylene recovery unit. However, the above technical solutions have the following problems: First, during filtration, coke powder and tar will adhere to the filter element surface to form a filter cake. When the filter cake is thick, reverse-phase purging is used to remove the filter cake from the filter element surface. Due to the high viscosity and strong adhesion of tar, the purging requires a large amount of power and consumes a lot of energy. Second, due to the strong adhesion of tar, purging alone cannot completely remove tar from the filter element surface. When filtration is performed again, coke powder and tar will condense on the filter element surface more quickly, resulting in a shortened service life of the filter element. Finally, tar is more likely to precipitate at low temperatures, while unfiltered catalytic dry gas is usually first subjected to dust removal at high temperatures. During the subsequent cooling process of the catalytic dry gas entering the heat exchanger, tar will further precipitate and adhere to the heat exchanger wall and heat exchange tubes, affecting the service life of the heat exchanger.

[0004] In summary, there is an urgent need to provide a filter component and filter that has low energy consumption, long service life, and thorough removal of coke powder and tar. Summary of the Invention

[0005] To solve at least one of the above-mentioned technical problems, the present invention provides a filter assembly, including a cylindrical sealed housing, a filter cartridge coaxially disposed inside the housing, a turntable rotatably disposed on the top of the filter cartridge, an air inlet located below the turntable and an air outlet located above the turntable on the housing, an inclined hole axially disposed on the turntable communicating with the filter cartridge, the airflow passing through the inclined hole driving the turntable to rotate, the outer wall of the turntable rotatably connected to the inner wall of the housing, a spiral scraper and a central shaft disposed on the lower end face of the turntable, the spiral scraper abutting against the outer wall of the filter cartridge and the inner wall of the housing respectively, the central shaft being connected to an annular scraper abutting against the inner wall of the filter cartridge via a cam mechanism, the annular scraper being able to move vertically back and forth when the central shaft rotates.

[0006] Preferably, the shell includes a shell body with openings at both ends, a filter cartridge fixed inside the shell body, a turntable rotatably positioned at the upper opening of the shell body, an air inlet on the side wall of the shell body, a cover on the top of the shell body, the cover being a cylindrical shape with a sealed top, an air outlet on the side wall of the cover, a conical sedimentation tank at the bottom of the shell body, a slag discharge pipe and a support at the bottom of the sedimentation tank, and an electric valve on the slag discharge pipe; a bearing is embedded above the outer side wall of the turntable, the bearing being connected to the inner side wall of the shell, and several inclined holes are equidistantly arranged along the circumference of the central axis, the inclined holes being inclined along their circumferential arrangement direction, and the central axis being a hollow structure.

[0007] Preferably, the filter cartridge includes a cylindrical filter screen and a plurality of reinforcing rods vertically disposed on the inner wall of the filter screen. The annular scraper includes a central ring slidably sleeved on a central shaft, a scraper ring slidably abutting against the inner side wall of the filter screen, and a connecting rod connecting the central ring and the scraper ring. The outer side wall of the scraper ring is provided with a vertical sliding groove that slidably engages with the reinforcing rods.

[0008] Preferably, the cam mechanism includes a ball head disposed on the inner sidewall of the central ring and an elliptical groove disposed on the outer sidewall of the central shaft and inclined from top to bottom, the ball head being able to slide along the elliptical groove.

[0009] Preferably, the filter cartridge further includes a fixing ring at the upper end of the filter screen, a fixing cylinder at the lower end of the filter screen and sealed at the bottom, a reinforcing rod connecting the fixing ring and the fixing cylinder, a gap between the fixing cylinder and the bottom of the housing, a rotating ring rotatably embedded above the outer side wall of the fixing cylinder, a spiral scraper connected to the outer side wall of the rotating ring, a plurality of connecting rods connected to the side wall of the housing are equidistantly arranged on the circumference of the fixing cylinder, a slag discharge port is provided at the bottom of the fixing cylinder, and a slag discharge component is provided on the slag discharge port.

[0010] Preferably, the slag discharge port is rectangular, and the slag discharge component includes a disc-shaped slag discharge seat fixed to the bottom of the inner wall of the fixed cylinder. The slag discharge seat is provided with a slag discharge channel that is sealed and connected to the slag discharge port. A rotary feeding roller is rotatably provided in the slag discharge channel, and the rotary feeding roller is connected to a rotary drive component.

[0011] Preferably, the rotary drive includes a rotating cylinder that rotates to fit against the inner wall of the fixed cylinder. The rotating cylinder is connected to the central shaft through a rod. A first conical gear is provided at the bottom of the rotating cylinder. The roller shaft of the rotary feeding roller rotates through the slag discharge seat and connects to a second conical gear that meshes with the first conical gear.

[0012] Preferably, the slag discharge seat and the fixed cylinder form an annular gap, the first bevel gear and the second bevel gear are both located within the annular gap, the rotating cylinder is a stepped cylinder that is wider at the top and narrower at the bottom, the outer wall of the upper end of the rotating cylinder is sealed and rotated to fit the inner wall of the fixed cylinder, and the inner wall of the lower end of the rotating cylinder is sealed and rotated to fit the outer wall of the slag discharge seat; the rod includes a connecting ring connected to the central shaft and several horizontal rods connecting the rotating cylinder and the connecting ring.

[0013] Preferably, the upper end face of the slag discharge seat is fixedly provided with a downwardly tapering guide cylinder, the upper end of the guide cylinder is sealed and rotated to fit the inner side wall of the rotating cylinder, and the lower end of the guide cylinder is sealed and connected to the slag discharge channel. The rotary feeding roller includes a cylindrical roller shaft and a roller body. The two ends of the roller body in the length direction are sealed and rotated to fit the slag discharge channel. The outer side wall of the roller body is provided with a plurality of material grooves extending along the length direction of the roller body at equal intervals. The slag discharge channel includes an upper opening connected to the guide cylinder, a lower opening connected to the slag discharge port, and a circular cavity sealed and rotated to fit the roller body.

[0014] This invention provides a filter, comprising a sealed tank, a filter assembly disposed within the tank, an air inlet pipe communicating with the air inlet of the filter assembly and an air outlet pipe communicating with the air outlet of the filter assembly on the side wall of the tank, a cold medium inlet and a support leg at the bottom of the tank, a cold medium outlet at the top of the side wall of the tank, a slag discharge pipe of the filter assembly sealingly penetrating the bottom of the tank, and a centering ring inserted into the shell of the filter assembly on the inner wall of the top of the tank.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects: 1. The filter assembly can self-clean under the action of airflow, saving energy and protecting the environment. The filter cartridge is coaxially arranged in the housing, with a spiral scraper on the outside of the filter cartridge and an annular scraper on the inside of the filter cartridge. The spiral scraper and the turntable are driven to rotate by airflow. The spiral scraper rotates to clean the outer wall of the filter cartridge and the inner wall of the housing. When the turntable rotates, it drives the central shaft connected to it to rotate. The central shaft drives the annular scraper to move vertically back and forth through a cam mechanism to clean the inner wall of the filter cartridge, which can improve the cleaning effect and effectively avoid filter cartridge clogging. 2. The filter cartridge consists of a filter screen, a fixing ring, a fixing cylinder, and a reinforcing rod. The fixing ring, fixing cylinder, and reinforcing rod form a skeleton structure, improving the filter screen's resistance to deformation. The fixing cylinder collects coke powder and tar and other waste residue scraped off by the annular scraper. The fixing cylinder is fixed to the inner wall of the shell by a connecting rod, allowing a gap to be formed between the fixing cylinder and the bottom of the shell. When the waste residue accumulates to a certain amount, it can be discharged from the discharge port through the slag discharge device. A rotating ring is rotatably embedded on the upper part of the outer wall of the fixing cylinder. The rotating ring can fix the bottom of the spiral scraper, improving the rotational stability of the spiral scraper. 3. The slag discharge component consists of a slag discharge seat, a slag discharge channel, a rotary feeding roller, and a rotary drive component. During the process of rotating in a sealed manner while adhering to the slag discharge channel, the rotary feeding roller seals and transports the waste slag above the slag discharge channel to the bottom of the slag discharge channel for discharge, which can effectively prevent the gas inside the filter cartridge from mixing with the gas outside the filter cartridge. 4. The rotary drive unit can drive the rotary feeding roller to rotate through the rotation of the central shaft, eliminating the need for additional rotary drive units such as motors, thus saving energy. The rotary drive unit consists of a rotating drum, a rod, a first bevel gear, and a second bevel gear. The rotating drum is connected to the central shaft through the rod. When the central shaft rotates, the rotating drum and the first bevel gear connected to the rotating drum rotate. The first bevel gear drives the second bevel gear meshing with it to rotate. The second bevel gear drives the roller shaft connected to it and the rotary feeding roller to rotate. 5. The slag discharge seat and the fixed cylinder form an annular gap. The first bevel gear and the second bevel gear are both located within the annular gap formed by the slag discharge seat and the fixed cylinder. The fixed cylinder is a stepped cylinder that is wider at the top and narrower at the bottom, which can seal the first bevel gear and the second bevel gear within the annular gap, effectively protecting the first bevel gear and the second bevel gear and improving transmission stability. 6. A guide tube is provided on the upper end face of the slag discharge seat. The guide tube can guide all the waste residue in the fixed cylinder into the slag discharge channel to avoid waste residue. The slag discharge channel consists of an upper opening that connects with the guide tube, a lower opening that connects with the slag discharge port, and a circular cavity that seals and rotates with the roller body. It can better seal and rotate with the roller body to prevent the gas inside the filter cartridge from mixing with the gas outside the filter cartridge, and further improve the filtration quality. 7. A cold medium can be introduced into the tank of the filter to cool the filter components. While filtering coke powder, the tar in the gas is separated in advance to prevent the tar from adhering in the heat exchanger when the gas enters the heat exchanger for cooling. The cold medium is preferably water or other raw materials that need to be heated. While cooling, the absorbed heat is converted into production heat, which is energy-saving and environmentally friendly. In summary, the filter component of this invention has low energy consumption, long service life, and thorough removal of coke powder and tar. The filter containing this filter component can pass a cold medium for heat exchange, which improves the tar removal effect while completing the heat exchange, thus saving energy and protecting the environment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the filter component in this invention; Figure 2 This is the right view of the filter component; Figure 3 for Figure 2 AA cross-section view; Figure 4 This is a schematic diagram of a filter assembly without a housing. Figure 5 This is a perspective view of the turntable from above. Figure 6 This is a schematic diagram of the filter cartridge structure; Figure 7 This is a schematic diagram of the structure of the annular scraper; Figure 8 A schematic diagram of the structure with the central axis; Figure 9 This is a schematic diagram of the slag discharge component; Figure 10 This is a three-dimensional cross-sectional view of the slag discharge component; Figure 11 This is a front view of the slag discharge component and the fixed cylinder; Figure 12 for Figure 11 BB cross-section; Figure 13 This is a schematic diagram of the filter structure.

[0017] Explanation of reference numerals in the attached figures: 1. Shell; 11. Shell body; 12. Cover; 13. Sedimentation tank; 14. Slag discharge pipe; 15. Support; 16. Air inlet; 17. Air outlet; 2. Filter cartridge; 21. Filter screen; 22. Fixing ring; 23. Fixing cylinder; 231. Slag discharge port; 24. Reinforcing rod; 25. Rotating ring; 26. Connecting rod; 3. Turntable; 31. Inclined hole; 32. Bearing; 4. Spiral scraper; 5. Central shaft; 51. Elliptical groove; 6. Annular scraper; 61. Central ring; 62. Scraper ring; 63. Connecting rod; 64. Vertical groove; 65. Ball head. 7. Slag discharge component; 71. Slag discharge seat; 72. Slag discharge channel; 721. Upper opening; 722. Lower opening; 723. Circular cavity; 73. Rotary feeding roller; 731. Roller shaft; 732. Roller body; 733. Material trough; 74. Rotary drive component; 741. Rotary drum; 742. Rod; 743. First bevel gear; 744. Second bevel gear; 75. Guide tube; 100. Tank body; 101. Air inlet pipe; 102. Air outlet pipe; 103. Cold medium inlet; 104. Support leg; 105. Cold medium outlet; 106. Centering ring. Detailed Implementation

[0018] The specific embodiments of the present invention are described below with reference to the accompanying drawings and examples: It should be noted that the structures, proportions, sizes, etc. shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should fall within the scope of the technical content disclosed in the present invention.

[0019] Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity of description and are not intended to limit the scope of the invention. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention. Example 1

[0020] Combined with appendix Figure 1-12 This embodiment provides a filter assembly, including a cylindrical sealed housing 1. A filter cartridge 2 is coaxially arranged inside the housing 1. A turntable 3 is rotatably arranged on the top of the filter cartridge 2. The housing 1 is provided with an air inlet 16 located below the turntable 3 and an air outlet 17 located above the turntable 3. The turntable 3 is provided with an inclined hole 31 axially communicating with the filter cartridge 2. When the airflow passes through the inclined hole 31, it can drive the turntable 3 to rotate. The outer side wall of the turntable 3 is rotatably connected to the inner side wall of the housing 1. The lower end face of the turntable 3 is provided with a spiral scraper 4 and a central shaft 5. The spiral scraper 4 abuts against the outer side wall of the filter cartridge 2 and the inner side wall of the housing 1 respectively. The central shaft 5 is connected to an annular scraper 6 abutting against the inner side wall of the filter cartridge 2 through a cam mechanism. When the central shaft 5 rotates, the annular scraper 6 can move vertically back and forth.

[0021] In the above technical solution, the cam mechanism can adopt any suitable structure, as long as it can drive the annular scraper 6 to move vertically and reciprocally with the rotation of the central shaft 5. The cam mechanism is a high-pair mechanism composed of three basic components: cam, follower, and frame. The cam is a component with a curved profile or groove, generally the driving component, which makes constant-speed rotary motion or reciprocating linear motion, and can convert rotary motion into reciprocating linear motion. In this embodiment, setting a curved profile or groove on the central shaft 5 can make the central shaft 5 form a cam that can rotate. Setting a groove or protrusion on the annular scraper 6 corresponding to the cam can form a follower that moves vertically up and down with the rotation of the cam. The spiral scraper 4 refers to a scraper that extends spirally around the filter cylinder 2, which can clean the outer wall of the filter cylinder 2 and the inner wall of the shell 1, and prevent the deposition of coke powder and tar to form a filter cake. The circumferential distance between the highest point and the lowest point of the spiral scraper 4 is preferably one-tenth to one-quarter of the circumference of the filter cylinder 2. In this embodiment, the spiral scraper 4 is equidistantly arranged around its circumference. Two; In use, the gas to be filtered enters the housing 1 through the air inlet 16, driving the spiral scraper 4 and the turntable 3 connected to the spiral scraper 4 to rotate. After being filtered by the filter cartridge 2, the gas enters the interior of the filter cartridge 2 and then flows out through the inclined hole 31 of the turntable 3. When the filtered gas passes through the inclined hole 31, it drives the turntable 3 and the spiral scraper 4 connected to the turntable 3 to rotate. Thus, under the action of the airflow, the spiral scraper 4 and the inclined hole 31 work together to make the spiral scraper 4 and the turntable 3 rotate. The spiral scraper 4 cleans the outer wall of the filter cartridge 2 and the inner wall of the housing 1. It should be noted that the spiral scraper 4 and the turntable 3 should rotate in tandem. Therefore, the rotation direction of the spiral scraper 4 driven by the airflow should be consistent with the direction of rotation of the turntable 3 when the airflow passes through the inclined hole 31. This is common knowledge and will not be elaborated further. When the turntable 3 rotates, the central shaft 5 connected to the turntable 3 rotates. The central shaft 5 drives the annular scraper 6 to move vertically up and down through the cam mechanism to clean the inner wall of the filter cartridge 2.

[0022] In this embodiment, the filter assembly can self-clean under the action of airflow. A filter cartridge 2 is coaxially arranged inside the housing 1. A spiral scraper 4 is arranged on the outside of the filter cartridge 2, and an annular scraper 4 is arranged on the inside of the filter cartridge 2. The spiral scraper 4 and the turntable 3 are driven to rotate by airflow. The spiral scraper 4 rotates to clean the outer wall of the filter cartridge 2 and the inner wall of the housing 1. When the turntable 3 rotates, it drives the central shaft 5 connected to it to rotate. The central shaft 5 drives the annular scraper 4 to move vertically back and forth through a cam mechanism to clean the inner wall of the filter cartridge 2, which can improve the cleaning effect and effectively prevent the filter cartridge 2 from clogging.

[0023] In one specific technical solution, the shell 1 includes a shell body 11 with openings at both ends, a filter cartridge 2 fixed inside the shell body 11, a turntable 3 rotatably disposed at the upper opening of the shell body 11, an air inlet 16 provided on the side wall of the shell body 11, a cover 12 provided on the top of the shell body 11, the cover 12 being a cylindrical shape with a sealed top, an air outlet 17 provided on the side wall of the cover 12, a conical sedimentation tank 13 provided at the bottom of the shell body 11, a slag discharge pipe 14 and a support 15 provided at the bottom of the sedimentation tank 13, and an electric valve (not shown in the figure) provided on the slag discharge pipe 14; a bearing 32 is embedded above the outer side wall of the turntable 3, the bearing 32 is connected to the inner side wall of the shell 1, and a number of inclined holes 31 are equidistantly arranged along the circumference of the central axis 5, the inclined holes 31 being inclined along their circumferential arrangement direction, and the central axis 5 being a hollow structure.

[0024] In the above technical solution, the shell 1 is a split structure. The shell body 11 and the cover 12, as well as the shell body 11 and the sedimentation tank 13, are preferably connected by flanges. The support 15 can adopt any suitable structure. In this embodiment, the support 15 includes an annular seat coaxial with the sedimentation tank 13. Several vertical rods are equidistantly arranged on the circumference of the upper end face of the annular seat. The vertical rods are fixed to the bottom of the sedimentation tank 13. The inclined hole 31 is inclined along its circumferential arrangement direction, which can form a stable torque and improve the rotational stability of the turntable 3.

[0025] In one specific technical solution, the filter cartridge 2 includes a cylindrical filter screen 21 and a plurality of reinforcing rods 24 vertically disposed on the inner wall of the filter screen 21. The annular scraper 6 includes a central ring 61 slidably sleeved on the central shaft 5, a scraper ring 62 slidably abutting against the inner side wall of the filter screen 21, and a connecting rod 63 connecting the central ring 61 and the scraper ring 62. The outer side wall of the scraper ring 62 is provided with a vertical sliding groove 64 that slidably cooperates with the reinforcing rods 24.

[0026] In the above technical solution, the reinforcing rods 24 are preferably arranged circumferentially at equal intervals. The reinforcing rods 24 can improve the structural strength of the filter screen 21, improve the filter screen 21's resistance to deformation, and prevent the filter screen 21 from being dented or bent. The vertical groove 64 on the scraper ring 62 cooperates with the reinforcing rods 24, which can not only clean the reinforcing rods 24, but also circumferentially lock the scraper ring 62 through the reinforcing rods 24 to prevent it from rotating. It should be noted that the vertical length of the spiral scraper 4 can be adapted to the vertical length of the filter screen 21.

[0027] In one specific technical solution, the cam mechanism includes a ball head 65 disposed on the inner side wall of the central ring 61 and an elliptical slide groove 51 disposed on the outer side wall of the central shaft 5 and inclined from top to bottom, wherein the ball head 65 can slide along the elliptical slide groove 51.

[0028] In the above technical solution, the outer wall of the central shaft 5 is provided with an elliptical groove 51 that slopes from top to bottom, which can form a cam in the cam mechanism. The ball head 65 on the inner wall of the central ring 61 can form a follower in the cam mechanism. When the central shaft 5 rotates, the ball head 65 slides along the elliptical groove 51. Since the elliptical groove 51 slopes from top to bottom, the ball head 65 can drive the annular scraper 6 to move vertically back and forth.

[0029] In one specific technical solution, the filter cylinder 2 further includes a fixing ring 22 located at the upper end of the filter screen 21, a fixing cylinder 23 located at the lower end of the filter screen 21 and sealed at the bottom, a reinforcing rod 24 connecting the fixing ring 22 and the fixing cylinder 23, a gap being provided between the fixing cylinder 23 and the bottom of the housing 1, a rotating ring 25 being rotatably embedded above the outer side wall of the fixing cylinder 23, a spiral scraper 4 being connected to the outer side wall of the rotating ring 25, a plurality of connecting rods 26 equidistantly arranged on the circumference of the fixing cylinder 23 and connected to the side wall of the housing 1, a slag discharge port 231 being provided at the bottom of the fixing cylinder 23, and a slag discharge component 7 being provided on the slag discharge port 231.

[0030] In the above technical solution, the fixing ring 22, the fixing cylinder 23, and the reinforcing rod 24 can form a skeleton structure, further improving the deformation resistance of the filter screen 21. For ease of processing and installation, the upper end of the reinforcing rod 24 is preferably fixed to the inner wall of the fixing ring 22, and the lower end of the reinforcing rod 24 is preferably fixed to the upper end face of the fixing cylinder 23, that is, the inner diameter of the fixing cylinder 23 is smaller than the inner diameter of the fixing ring 22. The fixing cylinder 23 can collect the coke powder and tar and other waste residue scraped off by the annular scraper 6. The fixing cylinder 23 is fixed to the inner wall of the housing 1 by the connecting rod 26, so that the fixing cylinder 23 can form a gap with the bottom of the housing 1. When the waste residue in the fixing cylinder 23 accumulates to a certain amount, it can be discharged from the slag discharge port 231 through the slag discharge component 7. The slag discharge component 7 can be a commonly used switch control such as an electric valve. A rotating ring 25 is rotatably embedded on the upper side of the outer wall of the fixing cylinder 23. The rotating ring 25 can fix the bottom of the spiral scraper 4, improving the rotational stability of the spiral scraper 4.

[0031] In one specific technical solution, the slag discharge port 231 is rectangular, and the slag discharge component 7 includes a disc-shaped slag discharge seat 71 fixed to the bottom of the inner wall of the fixed cylinder 23. The slag discharge seat 71 is provided with a slag discharge channel 72 that is sealed and connected to the slag discharge port 231. A rotary feeding roller 73 is rotatably provided in the slag discharge channel 72, and the rotary feeding roller 73 is connected to a rotary drive component 74.

[0032] In the above technical solution, the rotary feeding roller 73 paired with the rotary drive component 74 is a common sealed rotary feeding structure in the prior art, which can effectively prevent the gas inside the filter cartridge 2 from mixing with the gas outside the filter cartridge 2. The rotary drive component 74 can usually be a rotary drive component such as a motor. The rotary feeding roller 73 usually has a material groove extending axially on the surface of the roller. During the process of rotating in a sealed manner while adhering to the slag discharge channel 72, the rotary feeding roller 73 seals and transports the waste slag above the slag discharge channel 72 to the bottom of the slag discharge channel 72, and then discharges it from the slag discharge port 231.

[0033] In one specific technical solution, the rotary drive component 74 includes a rotating cylinder 741 that rotates and fits against the inner wall of the fixed cylinder 23. The rotating cylinder 741 is connected to the central shaft 5 through a rod 742. A first bevel gear 743 is provided at the bottom of the rotating cylinder 741. The roller shaft 731 of the rotary feeding roller 73 rotates through the slag discharge seat 71 and then connects to a second bevel gear 744 that meshes with the first bevel gear 743.

[0034] In the above technical solution, the rotary drive component 74 can drive the rotary feeding roller 73 to rotate through the rotation of the central shaft 5, without the need for additional rotary drive components such as motors, which is energy-saving and environmentally friendly; the rotating drum 741 is connected to the central shaft 5 through the rod 742. When the central shaft 5 rotates, the rotating drum 741 and the first bevel gear 743 connected to the rotating drum 741 rotate. The first bevel gear 743 drives the second bevel gear 744 meshing with it to rotate. The second bevel gear 744 drives the rotary feeding roller 73 to rotate. In this embodiment, there are two second bevel gears 744, which are installed at both ends of the roller shaft 731.

[0035] In one specific technical solution, the slag discharge seat 71 and the fixed cylinder 23 form an annular gap, the first bevel gear 743 and the second bevel gear 744 are both located within the annular gap, the rotating cylinder 741 is a stepped cylinder that is wider at the top and narrower at the bottom, the outer wall of the upper end of the rotating cylinder 741 is sealed and rotated to fit the inner wall of the fixed cylinder 23, and the inner wall of the lower end of the rotating cylinder 741 is sealed and rotated to fit the outer wall of the slag discharge seat 71; the rod 742 includes a connecting ring connected to the central shaft 5 and several horizontal rods connecting the rotating cylinder 741 and the connecting ring.

[0036] In the above technical solution, for ease of processing, the slag discharge seat 71 preferably adopts a split structure with symmetrical upper and lower parts, which can be connected by adhesive or screws to form a whole; the first bevel gear 743 and the second bevel gear 744 are both located in the annular gap formed by the slag discharge seat 71 and the fixed cylinder 23. The fixed cylinder 23 is a stepped cylinder that is wider at the top and narrower at the bottom, which can seal the first bevel gear 743 and the second bevel gear 744 in the annular gap, effectively protecting the first bevel gear 743 and the second bevel gear 744 and improving the transmission stability; the stepped cylinder that is wider at the top and narrower at the bottom of the rotating cylinder 741 means that the rotating cylinder 741 is composed of a large cylinder at the top and a small cylinder at the bottom, and a step is formed at the connection between the large cylinder and the small cylinder.

[0037] In one specific technical solution, the upper end face of the slag discharge seat 71 is fixedly provided with a downwardly tapering guide cylinder 75. The upper end of the guide cylinder 75 is sealed and rotated to fit the inner side wall of the rotating cylinder 741, and the lower end of the guide cylinder 75 is sealed and connected to the slag discharge channel 72. The rotary feeding roller 73 includes a cylindrical roller shaft 731 and a roller body 732. The two ends of the roller body 732 in the length direction are sealed and rotated to fit the slag discharge channel 72. The outer circumference of the roller body 732 is provided with a plurality of material grooves 733 extending along the length direction of the roller body 732 at equal intervals. The slag discharge channel 72 includes an upper opening 721 connected to the guide cylinder 75, a lower opening 722 connected to the slag discharge port 231, and a circular cavity 723 sealed and rotated to fit the roller body 732.

[0038] In the above technical solution, the guide tube 75 can guide all the waste residue in the fixed tube 23 into the slag discharge channel 72 to avoid waste residue. The slag discharge channel 72 is composed of an upper opening 721 that connects with the guide tube 75, a lower opening 722 that connects with the slag discharge port 231, and a circular cavity 723 that is sealed and rotated in contact with the roller body 732. It can better seal and rotate with the roller body 732 to prevent the gas inside the filter tube 2 from mixing with the gas outside the filter tube 2, and further improve the filtration quality.

[0039] The working principle and process of this embodiment are as follows: The gas to be filtered enters the housing 1 through the air inlet 16, driving the spiral scraper 4 and the turntable 3 connected to the spiral scraper 4 to rotate. After being filtered by the filter cartridge 2, the gas enters the interior of the filter cartridge 2 and then flows out through the inclined hole 31 of the turntable 3. When the filtered gas passes through the inclined hole 31, it drives the turntable 3 and the spiral scraper 4 connected to the turntable 3 to rotate. Thus, under the action of the airflow, the spiral scraper 4 and the inclined hole 31 work together to drive the spiral scraper 4 and the turntable 3 to rotate. The rotation of the spiral scraper 4 cleans the outer wall of the filter cartridge 2 and the inner wall of the housing 1. The coke powder and tar and other waste residue scraped off by the spiral scraper 4 fall into the sedimentation tank 13 at the bottom of the housing 1. When the turntable 3 rotates, the central shaft 5 connected to the turntable 3 rotates. The spindle 5 drives the annular scraper 6 to move vertically and reciprocally via a cam mechanism to clean the inner wall of the filter cylinder 2. The coke powder and tar scraped off by the annular scraper 6 fall into the fixed cylinder 23 at the bottom of the filter cylinder 2 and are guided into the slag discharge channel 72 by the guide cylinder 75. As the spindle 5 rotates, the rotating cylinder 741 connected to the spindle 5 via the rod 742 rotates. The first bevel gear 743 connected to the rotating cylinder 741 rotates. The first bevel gear 743 drives the second bevel gear 744 meshing with it to rotate. The second bevel gear 744 drives the rotary feeding roller 73 connected to it to rotate. The rotary feeding roller 73 seals and transports the slag in the slag discharge channel 72 to the slag discharge port 231. The slag falls from the slag discharge port 231 into the bottom of the shell 1. The electric valve on the slag discharge pipe 14 is opened periodically to discharge the slag. Example 2

[0040] Combined with appendix Figure 13 This embodiment provides a filter, including a sealed tank 100, in which a filter assembly as described in Embodiment 1 is provided. The side wall of the tank 100 is provided with an air inlet pipe 101 communicating with an air inlet hole 16 of the filter assembly and an air outlet pipe 102 communicating with an air outlet hole 17 of the filter assembly. The bottom of the tank 100 is provided with a cold medium inlet 103 and a support leg 104. The upper side wall of the tank 100 is provided with a cold medium outlet 105. The slag discharge pipe 14 of the filter assembly is sealed through the bottom of the tank 100. The inner wall of the top of the tank 100 is provided with a centering ring 106 that is inserted into the housing 1 of the filter assembly.

[0041] In this embodiment, a cold medium can be introduced into the tank 100 to cool the filter components. While filtering coke powder, the tar in the gas is separated in advance to prevent the tar from adhering in the heat exchanger when the gas enters the heat exchanger for cooling. The cold medium is preferably water or other raw materials that need to be heated. While cooling, the absorbed heat is converted into production heat, which is energy-saving and environmentally friendly.

[0042] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A filter assembly comprising a cylindrical sealed housing (1), characterized in that, The housing (1) is coaxially provided with a filter cylinder (2), and a turntable (3) is rotatably provided on the top of the filter cylinder (2). The housing (1) is provided with an air inlet (16) located below the turntable (3) and an air outlet (17) located above the turntable (3). The turntable (3) is provided with an inclined hole (31) axially connected to the filter cylinder (2). When the airflow passes through the inclined hole (31), it can drive the turntable (3) to rotate. The outer wall of the turntable (3) is rotatably connected to the inner wall of the housing (1). The lower end face of the turntable (3) is provided with a spiral scraper (4) and a central shaft (5). The spiral scraper (4) abuts against the outer wall of the filter cylinder (2) and the inner wall of the housing (1) respectively. The central shaft (5) is connected to an annular scraper (6) abutting against the inner wall of the filter cylinder (2) through a cam mechanism. When the central shaft (5) rotates, the annular scraper (6) can move vertically back and forth.

2. A filter assembly according to claim 1, characterized in that, The shell (1) includes a shell body (11) with openings at both ends, a filter cylinder (2) fixed inside the shell body (11), a turntable (3) rotatably located at the opening at the upper end of the shell body (11), an air inlet (16) on the side wall of the shell body (11), a cover (12) on the top of the shell body (11), the cover (12) being a cylindrical shape with a sealed top end, an air outlet (17) on the side wall of the cover (12), a conical sedimentation tank (13) at the bottom of the shell body (11), a slag discharge pipe (14) and a support (15) at the bottom of the sedimentation tank (13), and an electric valve on the slag discharge pipe (14); a bearing (32) is embedded above the outer side wall of the turntable (3), the bearing (32) being connected to the inner side wall of the shell (1), and several inclined holes (31) being equidistantly arranged along the circumference of the central axis (5), the inclined holes (31) being inclined along their circumferential arrangement direction, and the central axis (5) being a hollow structure.

3. A filter assembly according to claim 2, characterized in that, The filter cartridge (2) includes a cylindrical filter screen (21) and several reinforcing rods (24) vertically arranged on the inner wall of the filter screen (21). The annular scraper (6) includes a central ring (61) slidably sleeved on the central shaft (5), a scraper ring (62) slidably abutting the inner wall of the filter screen (21), and a connecting rod (63) connecting the central ring (61) and the scraper ring (62). The outer wall of the scraper ring (62) is provided with a vertical groove (64) that slidably engages with the reinforcing rods (24).

4. A filter assembly according to claim 3, characterized in that, The cam mechanism includes a ball head (65) located on the inner wall of the central ring (61) and an elliptical groove (51) located on the outer wall of the central shaft (5) and inclined from top to bottom. The ball head (65) can slide along the elliptical groove (51).

5. A filter assembly according to claim 4, characterized in that, The filter cylinder (2) also includes a fixing ring (22) at the upper end of the filter screen (21), a fixing cylinder (23) at the lower end of the filter screen (21) and sealed at the bottom, a reinforcing rod (24) connecting the fixing ring (22) and the fixing cylinder (23), a gap between the fixing cylinder (23) and the bottom of the shell (1), a rotating ring (25) is rotatably embedded on the upper side wall of the fixing cylinder (23), a spiral scraper (4) is connected to the outer side wall of the rotating ring (25), a number of connecting rods (26) connected to the side wall of the shell (1) are equidistantly arranged on the circumference of the fixing cylinder (23), a slag discharge port (231) is provided at the bottom of the fixing cylinder (23), and a slag discharge component (7) is provided on the slag discharge port (231).

6. A filter assembly according to claim 5, characterized in that, The slag discharge port (231) is rectangular. The slag discharge component (7) includes a disc-shaped slag discharge seat (71) fixed to the bottom of the inner wall of the fixed cylinder (23). The slag discharge seat (71) is provided with a slag discharge channel (72) that is sealed and connected to the slag discharge port (231). A rotary feeding roller (73) is rotatably provided in the slag discharge channel (72). The rotary feeding roller (73) is connected to a rotary drive component (74).

7. A filter assembly according to claim 6, characterized in that, The rotary drive component (74) includes a rotating cylinder (741) that rotates and fits against the inner wall of the fixed cylinder (23). The rotating cylinder (741) is connected to the central shaft (5) through a rod (742). A first bevel gear (743) is provided at the bottom of the rotating cylinder (741). The roller shaft (731) of the rotary feeding roller (73) rotates through the slag discharge seat (71) and then connects to a second bevel gear (744) that meshes with the first bevel gear (743).

8. A filter assembly according to claim 7, characterized in that, The slag discharge seat (71) and the fixed cylinder (23) form an annular gap. The first bevel gear (743) and the second bevel gear (744) are both located within the annular gap. The rotating cylinder (741) is a stepped cylinder that is wider at the top and narrower at the bottom. The outer wall of the upper end of the rotating cylinder (741) is sealed and rotated to fit the inner wall of the fixed cylinder (23). The inner wall of the lower end of the rotating cylinder (741) is sealed and rotated to fit the outer wall of the slag discharge seat (71). The rod (742) includes a connecting ring connected to the central shaft (5) and several horizontal rods connecting the rotating cylinder (741) and the connecting ring.

9. A filter assembly according to claim 8, characterized in that, The upper end face of the slag discharge seat (71) is fixed with a downwardly tapering guide cylinder (75). The upper end of the guide cylinder (75) is sealed and rotated to fit the inner side wall of the rotating cylinder (741). The lower end of the guide cylinder (75) is sealed and connected to the slag discharge channel (72). The rotary feeding roller (73) includes a cylindrical roller shaft (731) and a roller body (732). The two ends of the roller body (732) in the length direction are sealed and rotated to fit the slag discharge channel (72). The outer side wall of the roller body (732) is provided with several material grooves (733) that extend along the length direction of the roller body (732) at equal intervals. The slag discharge channel (72) includes an upper opening (721) that connects to the guide cylinder (75), a lower opening (722) that connects to the slag discharge port (231), and a circular cavity (723) that is sealed and rotated to fit the roller body (732).

10. A filter comprising a sealed tank (100), characterized in that, The tank (100) is provided with a filter assembly as described in any one of claims 2-9. The side wall of the tank (100) is provided with an air inlet pipe (101) communicating with the air inlet hole (16) of the filter assembly and an air outlet pipe (102) communicating with the air outlet hole (17) of the filter assembly. The bottom of the tank (100) is provided with a cold medium inlet (103) and a support leg (104). The top of the side wall of the tank (100) is provided with a cold medium outlet (105). The slag discharge pipe (14) of the filter assembly is sealed through the bottom of the tank (100). The inner wall of the top of the tank (100) is provided with a centering ring (106) that is inserted into the housing (1) of the filter assembly.

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